Board Thread:Roleplay Forum/@comment-17703532-20150329202043/@comment-17703532-20150503072901

(read this it isn't mentioned in the anime, but strongly hinted XD (the page is a translated version of one found on the official site (I think^^; )))

"Don't ask me how it works, because I don't know," Ai said, "but imagine a skin cream or foundation or something like that, which you put on exposed skin, such as face, legs, arms, etc, and this cream deflects bullets. It's actually kind of handy."